.container{
    position: relative;
    width: 100vw;
    height: 100vh;
}
.btn{
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}
.footer{
    display: flex;
    justify-content: flex-end;
    margin-top: 15px;
}
.input{
    width: 250px;
}